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WO2014209511A1 - Coupleurs optiques utilisés dans un ensemble séparateur de fond de trou - Google Patents

Coupleurs optiques utilisés dans un ensemble séparateur de fond de trou Download PDF

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Publication number
WO2014209511A1
WO2014209511A1 PCT/US2014/038419 US2014038419W WO2014209511A1 WO 2014209511 A1 WO2014209511 A1 WO 2014209511A1 US 2014038419 W US2014038419 W US 2014038419W WO 2014209511 A1 WO2014209511 A1 WO 2014209511A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
downhole
flats
interrogating
branches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2014/038419
Other languages
English (en)
Inventor
Michael Lagace
David Labella
Domino Taverner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weatherford Lamb Inc
Original Assignee
Weatherford Lamb Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weatherford Lamb Inc filed Critical Weatherford Lamb Inc
Priority to GB1519633.0A priority Critical patent/GB2528220B/en
Priority to NO20200420A priority patent/NO346781B1/en
Publication of WO2014209511A1 publication Critical patent/WO2014209511A1/fr
Anticipated expiration legal-status Critical
Priority to NO20151587A priority patent/NO344869B1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/10—Locating fluid leaks, intrusions or movements
    • E21B47/113—Locating fluid leaks, intrusions or movements using electrical indications; using light radiations
    • E21B47/114—Locating fluid leaks, intrusions or movements using electrical indications; using light radiations using light radiation
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
    • E21B47/135—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
    • G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
    • G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
    • G01D5/35354—Sensor working in reflection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35383—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques
    • G01D5/35387—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques using wavelength division multiplexing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0076—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
    • G01L9/0076—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means
    • G01L9/0077—Transmitting or indicating the displacement of flexible diaphragms using photoelectric means for measuring reflected light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means

Definitions

  • FIG. 7 is a block diagram illustrating example operations for determining one or more downhole parameters, according to an embodiment of the present invention.
  • FIG. 4 illustrates an example optical sensing system 400 used to interferometrically interrogate a pair of FBGs, according to an embodiment of the present invention.
  • the optical sensing system 400 may be employed, for example, in the downhole sensing system 100.
  • the pair of FBGs that bracket the coils may be interrogated by a series of pulses emitted from optical source 450.
  • Optical sensing branch 614 may be coupled to another sensor 618, which may also be an OSET P/T gauge (which may have a different characteristic wavelength than sensor 612), disposed near the point of splitting, at a location further downhole than sensor 612.
  • Optical sensing branch 616 may be coupled to sensor 620, at a point further downhole than sensor 618, which may be, for example, another OSET P/T gauge (which may have different characteristic wavelength than sensors 618 and 612). As shown, optical fibers 604 and 606 may not be split.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Remote Sensing (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Optical Transform (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Integrated Circuits (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measuring Fluid Pressure (AREA)
  • Optical Communication System (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

La présente invention se rapporte à des techniques et à un appareil pour la détection de fond de trou comprenant des coupleurs optiques utilisés dans un ensemble séparateur de fond de trou afin de séparer des signaux lumineux d'interrogation en plusieurs ramifications de détection optiques (608, 610, 622, 624, 626). Chaque ramification optique peut ensuite être couplée à un capteur optique (par exemple un élément d'intercommunication ou un transducteur optique simple (OSET) 612, 626, 628) ou à un autre coupleur optique pour une ramification supplémentaire. Les capteurs peuvent être des transducteurs du type pression/température (P/T). Certains systèmes peuvent utiliser exclusivement des OSET en tant que capteurs optiques. De cette manière, si l'un des OSET est endommagé, cela n'a aucune incidence sur la propagation de la lumière vers l'un des autres capteurs, et les informations de détection en provenance des capteurs restants sont quand même renvoyées.
PCT/US2014/038419 2013-05-17 2014-05-16 Coupleurs optiques utilisés dans un ensemble séparateur de fond de trou Ceased WO2014209511A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1519633.0A GB2528220B (en) 2013-05-17 2014-05-16 Optical couplers used in a downhole splitter assembly
NO20200420A NO346781B1 (en) 2013-05-17 2014-05-16 A cable for use in a downhole sensing system, and sensing system comprising the cable
NO20151587A NO344869B1 (en) 2013-05-17 2015-11-19 Optical couplers used in a downhole splitter assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361824541P 2013-05-17 2013-05-17
US61/824,541 2013-05-17

Publications (1)

Publication Number Publication Date
WO2014209511A1 true WO2014209511A1 (fr) 2014-12-31

Family

ID=50980380

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/038419 Ceased WO2014209511A1 (fr) 2013-05-17 2014-05-16 Coupleurs optiques utilisés dans un ensemble séparateur de fond de trou

Country Status (4)

Country Link
US (2) US9465137B2 (fr)
GB (2) GB2528220B (fr)
NO (2) NO346781B1 (fr)
WO (1) WO2014209511A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018022532A1 (fr) * 2016-07-27 2018-02-01 Schlumberger Technology Corporation Mesures réparties simultanées sur fibre optique

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US20140260588A1 (en) * 2013-03-12 2014-09-18 Halliburton Energy Services Flow Sensing Fiber Optic Cable and System
WO2016003393A1 (fr) 2014-06-30 2016-01-07 Halliburton Energy Services, Inc. Connecteur de ligne de commande hélicoïdale pour le raccordement à un récipient de complétion de fond de trou
WO2016003397A1 (fr) * 2014-06-30 2016-01-07 Halliburton Energy Services, Inc. Connecteur de ligne de commande de fond de trou expansible
US9915104B2 (en) 2014-06-30 2018-03-13 Halliburton Energy Services, Inc. Downhole expandable control line connector
US9568640B2 (en) * 2014-09-15 2017-02-14 Baker Hughes Incorporated Displacement measurements using simulated multi-wavelength light sources
AU2015363065B2 (en) 2014-12-17 2021-02-04 Geospace Technologies Corporation Pressure insensitive interferometer
EP3234668B1 (fr) 2014-12-17 2022-02-16 Geospace Technologies Corporation Dispositif de branchement pour circuits à fibres optiques
US10782443B2 (en) 2014-12-17 2020-09-22 Geospace Technologies Corporation Optical filter
US10254198B2 (en) * 2015-01-20 2019-04-09 Weatherford Technology Holdings, Llc Birefringent multi-peak optical reference element and birefringent sensor system

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DE4332501A1 (de) * 1993-09-24 1995-03-30 Siemens Ag Sensorsystem für sich dynamisch ändernde Meßgrößen und zugehöriges Betriebsverfahren
DE19548920A1 (de) * 1994-12-27 1996-07-11 Toshiba Kawasaki Kk Mit optischer Modulation arbeitender Sensor und diesen Sensor einsetzende Porzeß-Meßgeräteeinrichtung
WO2003098156A1 (fr) * 2002-05-17 2003-11-27 Sensor Highway Limited Capteur distant interferometrique a fibres optiques
US20130070235A1 (en) * 2011-09-20 2013-03-21 Yuehua Chen Multiple spectrum channel, multiple sensor fiber optic monitoring system

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US7653269B1 (en) * 2008-11-13 2010-01-26 Gooch & Housego Plc Quasi PM fused coupler devices and methods for forming the same
WO2013043235A2 (fr) 2011-09-22 2013-03-28 Ofs Fitel, Llc Câbles de distribution de fibres optiques
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DE4215167A1 (de) * 1992-05-08 1993-11-11 Bayerische Motoren Werke Ag Faseroptische Vorrichtung in Kraftfahrzeugen
DE4332501A1 (de) * 1993-09-24 1995-03-30 Siemens Ag Sensorsystem für sich dynamisch ändernde Meßgrößen und zugehöriges Betriebsverfahren
DE19548920A1 (de) * 1994-12-27 1996-07-11 Toshiba Kawasaki Kk Mit optischer Modulation arbeitender Sensor und diesen Sensor einsetzende Porzeß-Meßgeräteeinrichtung
WO2003098156A1 (fr) * 2002-05-17 2003-11-27 Sensor Highway Limited Capteur distant interferometrique a fibres optiques
US20130070235A1 (en) * 2011-09-20 2013-03-21 Yuehua Chen Multiple spectrum channel, multiple sensor fiber optic monitoring system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018022532A1 (fr) * 2016-07-27 2018-02-01 Schlumberger Technology Corporation Mesures réparties simultanées sur fibre optique
US11421527B2 (en) 2016-07-27 2022-08-23 Schlumberger Technology Corporation Simultaneous distributed measurements on optical fiber

Also Published As

Publication number Publication date
GB2528220B (en) 2017-07-26
US9465137B2 (en) 2016-10-11
GB201706204D0 (en) 2017-05-31
GB201519633D0 (en) 2015-12-23
US20140339411A1 (en) 2014-11-20
GB2547136A (en) 2017-08-09
NO346781B1 (en) 2022-12-27
NO344869B1 (en) 2020-06-08
NO20200420A1 (en) 2015-11-19
US20160252649A1 (en) 2016-09-01
GB2528220A (en) 2016-01-13
US10557963B2 (en) 2020-02-11
NO20151587A1 (en) 2015-11-19

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